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-12+x^{2}=1
Multiply 4 and -3 to get -12.
x^{2}=1+12
Add 12 to both sides.
x^{2}=13
Add 1 and 12 to get 13.
x=\sqrt{13} x=-\sqrt{13}
Take the square root of both sides of the equation.
-12+x^{2}=1
Multiply 4 and -3 to get -12.
-12+x^{2}-1=0
Subtract 1 from both sides.
-13+x^{2}=0
Subtract 1 from -12 to get -13.
x^{2}-13=0
Quadratic equations like this one, with an x^{2} term but no x term, can still be solved using the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}, once they are put in standard form: ax^{2}+bx+c=0.
x=\frac{0±\sqrt{0^{2}-4\left(-13\right)}}{2}
This equation is in standard form: ax^{2}+bx+c=0. Substitute 1 for a, 0 for b, and -13 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{0±\sqrt{-4\left(-13\right)}}{2}
Square 0.
x=\frac{0±\sqrt{52}}{2}
Multiply -4 times -13.
x=\frac{0±2\sqrt{13}}{2}
Take the square root of 52.
x=\sqrt{13}
Now solve the equation x=\frac{0±2\sqrt{13}}{2} when ± is plus.
x=-\sqrt{13}
Now solve the equation x=\frac{0±2\sqrt{13}}{2} when ± is minus.
x=\sqrt{13} x=-\sqrt{13}
The equation is now solved.